Reinforced-concrete building.



C. M. LEONARD. REINFORGBD CONCRETE BUILDING. APPLICATION FILED APB. 30, 1909.

Patented Feb. 9, 1915.

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To all whom it may concern Be it known that I, CLIFFORD M. LEONARD,

a citizen of the United States, and resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Reinforced-Concrete More particularly, the invention relates to' an improved manner of reinforcing the said columns and the floor slabs mounted thereon.

The object of the invention is to provide a building construction of the type described having the reinforcing members of its supporting columns and floor slabs so associated as to effect an integral connection between these parts, the reinforcing members being of such form that they may be readily and entirely produced without special tools from i the rods and bars now in common use for reinforcing concrete structures.

In the accompanying drawings, Figure'l is a plan view of a detail of building construction embodying the features of the'invention, some of the parts being broken away to illustrate the manner of reinforcingl a floor slab and supporting column there or; Fig. 2 shows in perspective the parts illustrated in Fig. 1.

A plurality of upright steel rods 10 are 5 employed as reinforcing members of the floor-supporting columns, as 11, of a. building. Most desirably the column 11 `has a flaring head 12.` In order that this Haring head may be as effectively reinforced as the body of the column, each of the rods-10 is bent outwardly adjacentl its higher end, as indicated at 13, Fig. 2. As shown, the rods 10 are symmetrically disposed about the a'xis of the column andeach is located adjacent the periphery or surface of the column. .By bending the rods 10 outwardly at 13 these rods may be brought as near to the surface of thecolumn in the Haring head 12 as in the body of the column. v

A plurality of closed hoops'lfi, surround and connect the vertical reinforcing rods 10. These hoops are spaced or-located at intervals throughout thetlength-of the column, those located within the head of the column -Specification of Letters atent.

hoop i4 at the top of the column ll, prefer# ing portions of the other rods being deflected downwardly in differing amounts, each rod may be employed for extending through the Patented niet. a, aegis;

Application ileg April 30, 1909. Srial No. 493,147.

' being of suilicient diameter to surround :the

outwardly-turned portions of .the rods 1.0.

A 4floor slab '15 is illustrated as being mounted uponv the head of column ll, and, reinforcing members 16 extend from the head of the column outwardlyinto the floor slab in various directions. shown, the l reinforcing members 16 are .laid vuporthel abl. in such ,a way that they extend diaa@ me rically across the hoop and project beyond the columnI head at each end, as at 17,- 16 (Fig. l2). To provide for the intersection of the reinforcing rods 16 at the axis of the column 11, the mid-portion of certain 7o of theserods is bent downwardly, as shown at 19, one of the rods, as 20, being preferably straight intermediate the points where it hes upon the hoop 14, and the correspondbeing defleccted suiiiciently to pass beneath the rod 2O and those other rods whose midportionsI are deflected to a' less extent.

Most desirably the. ends, as 17, 18, of the i8o rods, as 16, whichproject beyond the head of the column 11 are bentl downwardly, and upon these downwardly-deflected projecting ends of the rods 16 a plurality of rectangular open frames 21, 22, are laid. Preferet ably. the angles, as 23, 24:, of the frames 21, 22, extend in different directions with re'- spect to the axis of the column 11, the frame 21, as shown, being of less diameter than the frame 22, and being laid upon the rods 16 with each of its angles located midwaybetween adjacent angles ofthe frame 22., By means of the rods16 and frames 21, 22, a table, having its margins inclined downwardly, is provided upon the head of the column 11. This table conveniently serves for supporting such reinforcing material as floor slab 15 from the. column 11 to adjacent columns, not shown. As showin-a lurality of sets of parallel rods, as 25, 26, 2 28, are' employed for this purpose. Preferably the rods of each of these sets are laid upon the table formed by the` rods 16 and frames 21, Y 22, in such a way as to extend outwardly from the column 11 into the floor slab in' a, plurality of different directions symmetrically disposed about the column.'

By forming the rods l'ofthe :door slab independent of the vertical rods 10 of the 110 col 1 3,- the door maybe reinforced to any desired degree, irrespective of the size v or strength of the supporting column.

rlhe construction described provides an ecient manner of constructing buildings having floors supported by columns without the use of girders extending from column v to column and beams between the girders.

ideeen umn head, a series of spaced closed hoops 1n said column and head surrounding said rods, the hoops in the head being progressively of greater diameter from the bottom to the top of the head, a plurality of substantially horizontal reinforcing rods extending through the floor slab and over the column, and ,a table, for supporting the horizontal rods of the floor slab, comprising a plurality of independent horizontal rods seated on the upper hoop of'the column, and diametricallv arranged at different angles With respect tb the axis of the column and extended into the ioor slab beyond the column in opposite directions. y

oLIFFoRD M. LEONARD.

Witnesses: CHARLES B. GILsoN, E. M. Km'roHER. 

